Oven-door



H. BORN.

OVEN DOOR.

Patented Dec. 6, 1887..

(No Model.)

g mmunm & V YQ INVENTOR W m 1 WT UNITED STATES PATENT OFFICE.

HENRY BORN, OF CLEVELAND, OHIO.

OVEN-DOOR.

SPECIFICATION forming part of Letters Patent No. 374,391. date d December a, 1887. Application filed February 16, 1887. Serial No. 227,777,(No modeli) To aZZ whom it may concern:

Be it known that I, HENRY BORN, of Cleveland, in the county of Ouyahogaand State of Ohio, have invented a certain new and useful Improvement inOven-Doors; and I do hereby declare that the following is a full, clear,and complete description thereof.

The nature of my invention relates to new and improved means of openingand closing the doors of ranges or ovens, and the construction of saidimprovement is substantially as follows, reference being had to theaccompanying drawings and specification for illustration and descriptionthereof, in which Figure 1 represents a front elevation of a range-doorprovided with said improved de vices. Fig. 2 is a vertical sectionot'the same on line as m. Fig. 3 is an end view showing the door partlyopen and unlocked, and Fig. 4 is aplan view of Fig. 1.

Like letters of reference refer to like parts in the several views.

In Fig. 1, A represents a part of a range or oven, to which is pivotallyattached or hinged the door B by means of the pivots b, fitted to and inthe lugs or bearings a. To the upper side of the door is fixed thelocking device above alluded to, which substantially consists of one ormore raoklatches, E, and segmental pinion D, Fig. 2.

0 Care housings of a peculiar form, wherein slide the rack-latches E andthe pinions D are located. These housings are secured to the door orframe thereof by means of the countersunk screws 0 and d, which housingscontain the bearings for the handle F, Figs. 1, r

3, and 4, by which the conjoint and simultaneous action of the pinions Dis established. The pivotal ends a of the handle F extend through saidhousings, as seen in Figs. 1 and 4, and are square at that part to whichthe pinions D are fitted, to prevent the turning of the pinions on thehandle. The pivots 0 will therefore be larger at their inner ends, onwhich the square part joins, and smaller at their outer ends, in so muchas a circle comprising the corncrs of a square is larger than a circleformed within the sides thereof. These conditions are necessary in orderto fit the hearings in the housings and the square hole in the pinion.This connection of the pivots, pinion, and housing can be had by firstplacing the pinion in the housing and then entering pivots in thehousings, there being a rack and pinion in each housing 0 C inconnection with the handle F. The pinions D engage with the teeth of therack-latches E and hold the same up in the notch fof the lugs G, owingto the weight of the handle F, which acts as a lever, having its fulcrumin or on the pinions D. The housings are made to fit over the plain partof the raclrlatclies, thereby guiding the same.

To disconnect the rack-latch from the notch it is necessary to lift thehandle F, which turns the pinion, thereby moving the rack-latch in adownward direction until the upper end of a slot, g, in said rack-latchstrikes against the screw d, Fig. 2, thus preventing the rack frommoving down any more than necessary to pass the lug G in opening thedoor. When the door is open and the weight of the handle comes againinto action by means of the pinionsin the racks, then the lower surfaceof said slot arrests the upward movement of the rack when brought incontact with the screw d, Fig. 2. The extent of movement of the pinionand racks is controlled by said slot 9, and is very limited, so thatonly a few teeth are necessary to answer the purpose, and the wholeconstruction may be arranged within a comparatively small space andhousing, respectively. It will be noticed that the upper end of the rackis well rounded. The front and lower side of the lug G are also roundedand tapering toward the notch f, Figs. 2 and 3. This in closing the doorrenders the device selflocking, as the rack or bolt, when pushed againstthe lug G, which is attached to the oven, will yield and gradually slidedown on the tapering side and into the notch f without the necessity oflifting the handle F.

In doors of smaller size or form only one rack-bolt and lug areessential. In that case they are arranged in the center of the door witha handle properly constructed and fitted for operating the pinion andrack latch or bolt.

What I claim as my invention, and desire to secure by Letters Patent, isa l. Alocking device for oven or range doors, consisting of a housingsecured to the door, a handle pivoted in said housing and provided witha pinion for engagement in a rack-latch sliding between said housing anddoor, in combination with a notched lug projecting out latch,E,providedwith aslot,g,andapin orsteni from the range or oven, substantially asand secured to the door and extending through for the purpose described.said slot to control the extent of movement of :5:

2. In a locking device for the purpose dethe latch, in combination withthe housing 0,

5 scribed, the combination of a handle provided pinion D, door-handle,and lug'G, substantially with one or more pinions and pivotal bearingsas set forth. in housings secured to the door, of the rack- In testimonywhereof I affix mysignatnre in latches in gear with said pinions withinsaid presence of two Witnesses.

housings, and notched lugs con neeted with the HENRY BORN.

[o oven, arranged substantially as shown and set Witnesses:

forth. W. H. BURRIDGE,

3. In an oveudoor-locking device, a rack- B. F. EIBLER.

